T9402 Isolated 24V DC Digital Input Module for TMR Systems



Introduction:
The T9402 is a 16‑channel isolated digital input module built for Triconex TMR safety systems. It accepts 0–32V DC inputs, runs on 18–32V DC backplane power, and provides fast scan times for reliable monitoring in critical applications.
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Product Attributes:
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This 16‑channel isolated design ensures high noise immunity and protects against ground loops in harsh environments.
It supports simplex, dual, and triple redundant modes to meet different safety and availability requirements.
Ultra‑fast module scan times enable real‑time status monitoring for valves, switches, and other field devices.
The T9402 draws power directly from the system backplane with a wide industrial voltage input range.
Its efficient design keeps power usage and heat generation low for continuous, reliable operation.
Full channel isolation enhances system stability and protects the main controller from electrical disturbances.
This module is engineered for long service life in heavy‑duty process and safety control applications.
Technical Specifications
It supports simplex, dual, and triple redundant operating modes for flexible system design.
Simplex scan time is 0.924 ms for extremely fast single‑channel input monitoring.
Dual redundant scan time is 1.676 ms for improved reliability in critical applications.
Triple redundant scan time is 2.453 ms for maximum fault tolerance and safety performance.
Backplane voltage range is 18–32V DC, compatible with standard industrial power systems.
Maximum backplane current consumption is 260 mA under full load operation.
Input electrical rating is 0–32V DC at 6.5 mA per channel for safe field device connection.
Total power consumption of the T9402 is 4.0 W for energy‑efficient performance.
Heat dissipation is 4.0 W, equivalent to 13.6 BTU per hour during continuous operation.
Module weight is 340 grams (12 ounces), supporting compact and dense chassis installation.
Each input channel is fully isolated to improve noise resistance and prevent cross‑channel interference.
Installation Guide
Ensure the backplane provides a stable 18–32V DC power supply before system power‑up.
Connect field digital devices such as switches and sensors to the isolated input terminals.
Check all wiring connections to avoid short circuits and unwanted ground loops.
Fully seat and lock the module to guarantee reliable backplane communication.
Power on the system and verify module status for correct initialization.
Configure the module for simplex, dual, or triple mode based on system safety requirements.
Confirm input signal levels fall within the 0–32V DC operating range for accurate detection.
Provide adequate ventilation around the module to maintain safe operating temperatures.
Protect the unit from dust, moisture, and extreme temperatures during normal operation.
Packing List
- 1 × Allen-Bradley ICS Triplex T9402 Digital Input Module
- 1 × Installation and Specification Sheet
- Anti‑static protective bag
- Product identification label

